Plant construction will start this spring, Smucker said in a news release, and production of Uncrustables — pre-made frozen peanut butter and jelly sandwiches that consumers thaw and serve — is expected to begin in 2019.

Construction of the Longmont plant "is contingent on the approval of tax and business incentives and the closing of the transaction to purchase the real property where the facility will be located," the company said in the release. Details of the incentives being sought were not disclosed.

Smucker said the Longmont plant will complement an existing Uncrustables plant in Scottsville, Ky., which will continue to produce up to 2 million sandwiches per day. The Uncrustables brand has grown from about $10 million in annual sales in 2000 to a $200 million business today, the company said in the release.

Mark Smucker, the company's president and CEO, said in a statement that the brand has grown "as consumers seek nutritious snacks and meal solutions for the whole family." He said the new plant "will ensure we can continue to meet increasing demand across the country."

The Longmont facility will be constructed in two phases over multiple years, the company said. Phase one includes up to an initial $200 million investment to construct and operate the plant. Phase two could see an additional $140 million investment for expansion, depending on product demand.

Smucker said the plant will have about 250 employees when phase one is complete and up to 500 employees in total with the completion of phase two.